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Preview scale: 8.0 x 8.0 inches
<a href='http://www.spoonflower.com/explore/1855839-symmetry-group-cm-centred-by-sef' title = 'symmetry group cm centred by sef on Spoonflower - custom fabric'><img src='http://s3.amazonaws.com/spoonflower/public/design_thumbnails/0185/5839/rp1xx-600-50-6_shop_preview.png' alt='symmetry group cm centred'/></a>
Change DPI Base size is 150
Designs by sef
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Following the diagonal (a translation operation) takes you to the real next unit cell - whereas the fake but convenient unit cell is a doubled centred one occupying a quarter of the swatch. The glide reflection lines are the green dashed ones here. When you follow one of those lines, you flip your elements over for every half cell of distance you cover - so it's a slide and flip operation for the glide reflection. Whereas a normal mirror reflection line (the solid blue ones here) flips things over in situ without a combined translation component.
Posted almost 2 years ago.
So helpful Sef - I think i now u/stand the 'glide' part - following the diagonal makes it clear.
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